Finding the Fourth Proportional to 1,608.82, 2,219.88 and 945.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.82 : 2,219.88 = 945.70 : x
2. Step 2: Convert to fraction form
   1,608.82/2,219.88 = 945.70/x
3. Step 3: Cross multiply
   1,608.82x = 2,219.88 × 945.70
4. Step 4: Simplify right side
   1,608.82x = 2,099,340.52
5. Step 5: Solve for x
   x = 2,099,340.52/1,608.82
6. Step 6: Final answer
   x = 1,304.89